<!doctype html>
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>test charset page</title>
</head>
<script>
function getEncoding() {
    console.log("charset:"+document.charset);
    return document.charset;
}
</script>
<body>
hello world, 你好世界!
</body>
</html>